Single-seat throttle valve



' 1 616,259 Feb. 1, 1927. S. TAYLOR SINGLE SEAT THROTTLE VALVE File?June 19, 1923 s Sheets-Sheeti- GU01 mu I 1,616,289 1927- s. w. TAYLORSINGLE SEAT THROTTLE vALvE Filfad June 19 1923 3 Sheets-Sheet 2 h 1 ,9 M:3

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a a: a? v Q 7- s w. TAYLQR SINGLE SEAT THROTTLE VALVE 3 Sheets- SheetFiled June 19, 1923 Patented Feb. 1, 1927.

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SAMUEL \V. TAYLO1-t, or BALTIMORE, MARYLAND; assrenon TO POO-LEENGINEER- ING AND'MACHINE COMPANY, on woonsnrtrtv, BALTIMORE) MARYIQAND,A con- PORATION or MARYLAND.

SINGLE-SEAT THROTTLE VALVE.

Application filed June 19,

My invention relates to'single seat throttle valves, such as areintended fo'r'closing and opening communication between a source offluid pressure and a receptacle, machine, ap-

paratus or point to Which-it is desired to ad'- mit the fluid pressureat will.

Among the objects ot my invention arez- To provide a single seatthrottle valve combined with means for operating said valve, said meansbeing constructed and arranged so that its operation may be controlledby a. device located at a distance from said valve.

To provide an unbalanced throttle valve and fluid operated means foroperating said valve so constructed and combined with said valve thatthe fluid pressure which operates said operating means will be in onecase, additive to the unbalanced pressure upon 29 said throttle valve inorder to more-securely seat said throttle valve upon its valve port and,in the other case5 the fluid pressure upon said operating means Will besubtractive from the unbalanced pressure upon said throttle valve andbeing numerically greater than the unbalanced pressure upon saidthrottle valve will cause said throttle valve to move from the valveport.

To provide a throttle valve with fluid pressure operated means formoving said valve to and away fronrthe valve port, said means being soconstructed and arranged that notwithstanding large forces are appliedto the moving of said valve by said means, said valve contacts With thevalve port without shock and is stopped in the open position alsowithout shock.

To provide a single seat throttle valve coinbined with operating meanstherefor the movements of the latter beingcontrolledby suitable valveswhich, in turn, are moved by air operated means, the latter being controlled by a hand or automatically operated valve.

To provide a single seat throttle valve and fluid operated means foroperating said valve mounted upon the valve casing and connected to thevalve by a valve stem passing through said casing, said operating meansbeing secured to the valve casing in such a manner that the glands ofstuffing boxes provided in the valve casing and in the operating meansfor preventing leakage was. SeriatNo. castes.

past the valve stem are'capable' of adjustment or repacking without thedisarrangement of any of the parts.

To provide an operating means for a throttle valve having'a pistonprovided with packin' so arranged that said piston may be repacked byremoving the head of the cylinder in which said piston Works andremoving a portion only of said piston.

Toprovide a valvehaving steam' pressure normally upon one side thereofwith a valve stem having a passage and a piston for op erating saidvalve connected to said valve stem and provided with a chambercommunicating with said passage, said piston being arranged to work in acylinder to the ends of which steam can be alternately admitted foroperating said valve and from both sides of which steamis at timescutoff, in which case the steam upon'one side of the throttle valve willpass through said passage to said'chamber' and keep all the partssufiiciently warm to insure operation even in the coldest weather.

These and further objects of my invention will become apparent in thefollowing specification, reference being had to the accompanyingdrawings and the novel'means by which said objects are effected will bedefinitely pointed out in the claims.

In the drawings?- Figure 1 is a central section of a valve constructedaccording to my invention.

Fig.2 is a View of the valve shown in Fig. 1 looking in the direction ofthe arrow 2" in said figure.

Fig. 3 is a section along the line 33 in Fig. 2; y

Fig. 4 is an enlarged section along the line 4-4 in Fig. 2 looking inthe direction of the arrows.

Fig. 5 is an enlarged section along the line 5 in Fig. 2 looking in. thedirection of the arrows.

Fig; 6 is a section similar to that shown in Fig. 3 but showing adilferent arrange ment of ducts. I

Fig. 7 is a diagrammatic illustration of the application of my improvedvalve to a locomotive booster.

In the drawings 10 is the valve casing which is provided with flanges 11and 12 for attachment to pipes. The flange 11 is at the end throughwhich steam enters the valve casing and the liange 12 at the end throughwhich steam leaves the valve casing.

A septum is provided in the casing in which is formed the valve port 13which the valve 14 is adapted to close. Steam pressure normally existson the top of the valve 14.

The valve 14 is provided with a valve stem 15 which is tapered at itsupper end and has secured thereto the discs 16 and 17 which togetherform a piston which reciprocates vertically in the cylinder 18. Thediscs 16 and 17 are secured on the valve stem 15 by a nut 19. Notchesare turned in the abutting faces of the discs 16 and 17 and the nutserves to clamp the packing 20 within said notches so as to preventleakage past the piston.

The discs 16 and 17 are recessed on their abutting faces so as to forman annular chamber 21 and said chamber communicates through the passage22 in the stem 15 with the steam pressure on the top of the valve 14 inorder to provide that the valve stem, piston and cylinder will be keptwarm in cold weather when steam is not admitted to either side of saidpiston.

"Water of condensation that may accumulate on the top of the disc 16 canpass through the holes 22 22 to the chamber 21 and said water togetherwith the water of condensation that may accumulate in the chamber 21 maydrain by gravity through the passage 22.

In order to prevent steam passing through the holes 22*22 to the exhaustwhen the valve 14 is open as hereinafter described, the disc 16 isformed with a valve surface 16 which contacts with the valve surface 18on the cylinder head 29.

The cylinder 18 is closed at its lower end by a head formed integrallytherewith and said head is provided with a recess containing packingwhich is adjustable by the gland 24. A similar packed recess is providedin the flange 25 which is adjustable by the gland 26. The flange 25closes the top of the valve casing 10. The glands 24 and 26 serve toadjust the respective packings so as to prevent leakage past the valvestem 15 and said glands are adjustable by the application of a toolintroduced through openings, one of which is shown at 27, between thefcet 2828 formed integrally with the cylinder 18 which support thelatter in spaced relation to the casing 10.

By removing the upper head 29 the nut 19 may be taken off and the disc16 removed to introduce new packing 20.

For the purpose of operating the valve 14 the followinginstrumentalities are provided:

Thecylinder 18 has an offset 30 formed integrally therewith and in saidoffset there are formed bored holes which are b ushed by the valvebushings 31 and 32. Each of said bushings is provided with boredportions 33 and 34. In the bored portion in each bushing there isslidably mounted a piston valve 35 and in the portion 34 in each bushingthere is mounted a ball valve 36. The ball valve 36 is adapted tocontact with a valve seat formed at an end of the passage 37 whichextends between the portions 33 and 34 in each valve bushing. Each ofthe portions 34 is closed by a plug 38 and each of the port-ions 33 isclosed by a sleeve 39. The stem 40 of the valve 35 in the bushing 31passes through one of the sleeves 39 and the valve stem 41 of the valve35 in the bushing 32 passes through the other sleeve 39.

Each valve 35 is provided with a push rod 42 formed integrally therewithand said push rod is adapted to lift the ball valve 36 from its seat.

The passage 37 in the bushing 31 is connected by the duct 43 with thespace in the cylinder 18 below the piston. The passage 37 in the bushingis connected by the duct 44 with the space in the cylinder 18 above thepiston. The duct 45 in each of the bushings 31 and 32 is each connectedto the duct 46 and the latter is connected to a source of steampressure. each of the bushings 31 and 32 is each connected to the duct48 and the latter is open to the atmosphere.

The valve stem 40 is directed upwardly and the valve stem 41 is directeddownwardly and said valve stems are moved by ta-ppets 49 and 50,respectively. The tappet 49 is mounted upon the connecting rod 51 whichis slidably mounted in a hole provided in the offset 30 and the lowerend of said connecting rod is secured in the tappet 50. The tappet issecured to the piston rod 52 and the latter is slidably mounted withinthe cylinder provided in the offset 30.

The piston 54 is mounted upon the rod 52 and the spring 55 keeps thepiston 54 normally in the position shown in Fig. 1.

The space in the cylinder 53 above the piston 54 is connected by thepipe 56 with any approved form of valve which is arranged to admit airpressure to the upper side of said piston. The pipe 56 passes freelythrough a hole provided in the tappet 49.

The operation of my improved valve is as follows The parts being in thepositions shown in Figs. 1, 2, 4 and 5 and steam. pressure being presentwithin the casing 10 upon the top of the valve 14 and within the duct46. it is evident that steam pressure will exist in the ducts 45 in thebushings 31 and 32.

The duct 47 in The steam pressure in the duct of the bushing 31 will beprevented from reaching the duct 43 because the corresponding ball valve36 is against its seat. The ball valve 36 in the bushing 32 being oh?its seat, the steam pressure in the corresponding duct 45 will passthrough the duct 44 to the upper side of the piston in the cylinder 18and, consequently, the pressure of the steam on the top side of saidpiston will be added to the pressure of the steam on the top side of thevalve 14 to keep the same firmly against its seat.

It is to be noted that the piston valve 35 in the bushing 32 is heldagainst a valve seat formed at the end of the corresponding passage 37and, consequently, the steam from the duct 45 is prevented from passingthrough the duct 47 to the atmosphere.

If the operator desires to raise the valve 14 he admits air pressure tothe pipe 56 which forces the piston 54 downwardly against the pressureof the spring 55. As the piston 54 moves downwardly the tappet 49 movesthe valve stem 40 downwardly and moves the corresponding ball valve 36downwardly against ;the pressure of the steam in the correspondingportion 34. The tappet also moves downwardly and the steam pressure uponthe upper end of the corresponding piston valve 35 moves said valvedownwardly until the valve face 57 on the lower end of said valvecontacts with the valve seat 58 formed on the correspond ing sleeve 39in order to prevent leakage of steam around the stem 41. When the stem41 moves downwardly as just descrihech the corresponding' ball valve 36will he moved downwardly by the steam pressure until it rests on thevalve seat at the top of the corresponding passage 37, thus terminatingcommunication between the steam pressure and the upper side of thepiston in. the cylinder 18 and at the same time the corresponding pistonvalve 35 will uncover the duct 47, thus opening communication from theduct 44 to the atmosphere.

As the valve stem 40 moves downwardly the corresponding ball valve 36will he moved downwardly from its seat and steam pressure will. passfrom the duct 45 to the duct 43 and thence to the bottom of the pistonin the cylinder 18. At the same time the corresponding piston valve willclose the duct 47 which leads to the atmosphere.

lVhe-n steam pressure is admitted to the bottom ofthe piston in thecylinder 18., a pressure is developed which acts upwardly on the pistonand is greater than the pressure which acts downwardly upon the valve14; consequently. the valve 14 is moved upwardly until the surface 16strikes the surface 18 on the upper head 29 to prevent live steampassing to the exhaust.

The valve 14 then remains in the upper position as long as air pressureis maintained in the pipe 56. l i hen the operator desires to close thevalve 14, he shuts off the air pressure from the pipe and connects saidpipe to the atmosphere. The spring then moves the piston 54 upwardly andthe valve stems 40 and 41 also move upwardly operating their respectivevalves in a manner that will he clear from the foregoing so as to admitsteam pressure to the top of the piston in the cylinder 18 and toconnect the bottom of said cylinder to the atmosphere, thus producing adownward motion of the valve 14 to close its port.

It is to he noted theft 1 have made the various ducts through whichsteam passes to the upper and lower sides of the piston in the cylinder18, of such sizes that the steam passing tl'ierethrough will bewire-drawn to s .ch an extent as to insure a comparatively slow motionof the valve 14 and the piston which operates same in order to minimizethe shock when the valve 14 contacts with its seat and when the surface16 contacts with the surface 18.

For some applications of my improved valve it may be desirable tomaintain air pressure upon the top of the piston disc 16 in order toeliminate the water of condensation from the top of said disc.

When it is desired to maintain air pres sure upon the top of the disc16, the holes 22-'22 are to be omitted and the steam and air ducts areto be arranged as shown in Fig. 6.

In Fig. (3 the ducts 43 and 44 are the same as the ducts 43 and 44,respectively shown in Fig. 3 and said ducts are similarly connected tothe respective valve bushings 31 and 32. The ducts 46 and 48 areconnected to the valve bushing 32 in the same manner the ducts 4G and 48in Fig. 3. The ducts 46 and 48 are connected to the valve hush ing 31 inthe same manner as the ducts 46 and 48 in Fig.

A source of air pressure is connected to the duct 46 and a source ofsteam pressure is connected to the duct 46. The ducts and 48 areconnected to the exhaust.

From the foregoing it evident that air pressure will exist upon the topof the disc 16 when the piston is. in the position shown in Fig. 1.Otherwise the operation of the parts is thc same as hetero described.

I will now describe the application of my improved valve to the controlof a locomo tive booster as shown (:li'agrammatically in Fig. 7.

59 is the steam dome of a locomotive containing; the throttle valve 60which is manually operated hy the lever 61. The valve (30 is to opencommunication through the pipe 62 between the steam dome 59 and thecylinders of the locomotive engine, (not shown). The locomotive engineis to rotate track &

wheels, (not shown), and the direction of rotation of said wheels is tobe controlled by the reversing lever 68 which operates a reversing gearfcrn'iing a part of said engine.

The above named parts are old in the art and, therefore, have not beenillustrated in detail.

The axle of one of the locomotive track wheels is shown at 64 and thebooster engine 65 is intended to add its tractive effort to the tractiveeffort exerted upon said axle by the locomotive engine.

My improved valve is mounted in any approved location upon thelocomotive as, for instance, upon the dome 59, in order to connect theflange 11 of the valve casing 10 to a source of live steam. The duct 46is to be connected to the pipe 62 between the throttle valve 60 and thelocomotive engine. If a superheater is used the duct 46 is to beconnected to the pipe 62 between said super-- heater and the locomotiveengine.

To the sector 66 of the lever 68 there is secured a bracket upon whichthe lever 67 is pivotally mounted. The right end of the lever 67 ismoved downwardly when the lever 63 is moved toward the rightsufficiently to bring the roller 68 under the left end of the lever 67.

Whenever the lever 67 is thus moved it moves the stem 69 downwardly andoperates the valve 70 to allow air to flow from the reservoir 71 throughthe pipe 56 to the top of the piston 54, (shown in Fig 1.)

When air flows to the top of the piston 54 it is moved downwardly andoperates the valve stems 4.0 and l1, as before explained.

The valve 14 will still remain in the position shown in Fig. 1 until thethrottle valve 60 is operated and steam enters the pipe 62. steam willthen flow from the pipe 62 to the duct 46 and then under the piston inthe cylinder 18, thus raising the valve 14.

lhe valve 14 will remain raised until the valve 60 is moved to cut offsteam from the pipe 62 or until the reverse lever 63 is movedsufficiently to the left to remove the roller 68 from contact with thelever 67.

it is to be noted that by connecting the duct 46 to the pipe 62 betweenthe throttle valve 6() and the locomotive engine that I am enabled todispense with the pilot valve that is usually employed with boosterthrottle valves.

While I have shown two preferred forms of my improved valve and oneapplication of said valve to the control of a locomotive booster, it isto be understood that the disclosures are for purposes of illustrationonly and in nowise to limit the scope of my invention, for variouschanges may be made in the forms and locations of the parts of saidvalve and it may be applied for various purposes without departing fromthe spirit of my invention.

I claim i 1. In a throttle valve, the combination of a casingcon'iprising a valve port, a valve for closing said port, a cylindermounted on said casing, a hollow piston mounted in said cylinder andcomprising holes providing communication between the interior thereofand the portion of said cylinder above said piston, said portion beingclosed: to the exhaust when said valve is closed and open to the exhaustwhen said valve is open, a valve surface on said piston surrounding saidholes, a. hollow rod connecting said cylinder and valve and providingcommunica tion between the inlet side of said valve and the interior ofsaid cylinder, and a valve surface on said cylinder adapted to contactwith the valve surface on said piston when said valve is open to closethe passage from the interior of said piston to said cylinder.

2. In a throttle valve, the combination of a casing comprising a valveport, a valve for closing said port, a cylinder mounted on said casing,a rod attached to said valve and extending into said cylinder, a pistonmounted on said rod, valves for controlling the admission and exhaust ofpressure alternately to and from the sides of said piston, each of saidvalves comprising a valve bushing having pressure and exhaust openingsand an opening connected to said cylinder at one side of said piston,- apiston having valve surfaces at its ends slidably mounted in acylindrical hole comprised in said bushing and connecting said openings,valve seats in said bushing for contacting with said surfaces anddisposed on opposite sides of said exhaust opening, a valve seat in saidbushing between said pressure opening and said opening that is connectedto said cylinder, a ball for contacting with said last named seat toclose the passage between said last two named openings, a stem on saidlast named piston by which it can be moved and a second stem on saidlast named piston for moving said ball.

8. The combination with a valve bushing comprising pressure and exhaustopenings and a third opening for connection to a mechanism to becontrolled by said valve, of a piston having valve surfaces at its endsslidably mounted in a cylindrical hole comprised in said bushing andconnecting said openings, valve seats in said bushing for contactingwith said surfaces and disposed on opposite sides of said exhaustopening, a valve seat in said bushing between said pressure opening andsaid third opening. a ball for contacting with said last named seat toclose the passage between said pressure and third openings, and a stemon said piston for moving said ball.

In testimony whereof, I affix my signature.

SAMUEL TAYLOR.

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